cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A107388 Expansion of x*(3*x-1)*(2*x-1) / ( (1-x)*(1+x)*(x^2-4*x+1) ).

Table of values

n a(n)
0 0
1 1
2 -1
3 2
4 4
5 21
6 75
7 286
8 1064
9 3977
10 14839
11 55386
12 206700
13 771421
14 2878979
15 10744502
16 40099024
17 149651601
18 558507375
19 2084377906
20 7779004244
21 29031639077
22 108347552059
23 404358569166
24 1509086724600
25 5631988329241
26 21018866592359
27 78443478040202

List of values

[0, 1, -1, 2, 4, 21, 75, 286, 1064, 3977, 14839, 55386, 206700, 771421, 2878979, 10744502, 40099024, 149651601, 558507375, 2084377906, 7779004244, 29031639077, 108347552059, 404358569166, 1509086724600, 5631988329241, 21018866592359, 78443478040202]